Grate bar for pulverizing machines



Feb. 2 1926. 571,675

H. s. KNIGHT GRATE BAR FOR PULVERIZING MACHINES Filed Feb. 21, 1925 sv or 'nvitnsron, IL inots." itssionon mo. AM'ERIeAN MANGANESE STEEL commit-"Y. or criterion. IQLLINKQISQAYCQBPQEATIQNIQFQMAINE e' nan 'roarnnvnnimneaiiilio nuns Application filed ram- 21-, iezsi seiai-nafi ink/3t 1'0 (115/ when wary, warez-n: i-ng' t th' grate 'an l thelugs on the relio ithnown that I, ItI-IRVEY- I": p a citize f fl linitcd States. l'tfldlttfi' at; Q,t;,i.litt'ei-e1it1 depth sotl atittwo bars are titans? on. in the county oi (look and titatc positionedtwi -i -their hortiest lugs 'in abutot' Illinois, haveinvented certain new and; inent; netul improvements intlrate, BitlfS"LilUlbarsvilllt' .lulverii ainr iiachines of which the tolioui \Yli'il one barhas its shortoar-,haslit This invention relates to barswiiieh are; up

i er hugs 111 abutment thereinst, an employed in suitable inuni' i. fteniiiediat spacing will ren-Wtv'v'o bai-s both have their here to develop a siil'tt-g a ndiavhe ratii'nr which serves a, a su moi-tin and'rer ion- 'er lu s n mernuist the maximum s 3210- r l h i t: n 7 .l.

during surface for mineral substances while inn" will result lfitlil acted upon by rotaryhaniniers or oth- Inthc ac. )rnp-anyinpf drawing'- 7 or terms i reducing eienients, Flgllljt si t end 8' are, end views each .,-.r Among; the objects ot the present inten showing,zuplurality of'g-rate barsnrrelative ill adapt a plurality thereof to "assen if the; barsselec't. ely spaced to develop, in bled in the grating in several ditl'erent relay the respective.-'views,the n'iaxiniunu't-he in lions. each oi which establishes a dill ermit. termediate;and the n'iiniinu'ni spacing-.1 spacing of the bars and correspoiulinggrad;- Figure/l is-a plan view (it 0110P'I1tl of a ing of the material permitted to pass gratebarthatis typi'ealof thoseillustrated tl'irongh the grating; also to provide a form inlf igiii'es 1,2,.and 3, and i Y of grate liar which, while serving the ob-.1 Figure is a side view of the same.

jet-t: iirsi named, will also serve the purpose 1 represents a series of grate bars post of ati'ordinn' two diti'crent wearing swimtiopgd in iltigures 1,'2,'and 3 in the relations for PlUSt1'lt2Itl()tl, in sup iiorting relation to which they areintended to assume in inalcthe material to be reduced, namely by ining up a. grating upon which material is vertiug the bars about their loiuntudhial supported while being reduced, physically, axes; also to adapt grate bars, while serving and through which the material is inthe tirst and second objects nan'ied, to be astended to pass when it reaches a predesociated eaeh with any other bar in either termined degree of reduction. The bar's t of its own two positions, or in either of the are spaced apart. by lugs 2 which abut totwo positions which the other bar is adaptgether so that their combined dimensions ed o assume; also to provide a term of define the spacing between the bars, when grate bar which, while serving all ot the the supporting faces 23 ot the bars are in aforesaid purposes, well adapted for eeoposition to constitute the surface oi the noniiea] production in the foundry, of inategrate It is customary to support bars in rial such as manganese steel which while service by confining them between a lower well suited for use in situations involving supporting ledge land an upper confining highly abrasive influences, requires a resort ledge 5 (Figure 1.), between which ledges to grinding for such finishing operations as the bars may tit with sufiicient snugness to the castings may require. resist: tipping, ot' the bars in case they are in in carrying out the invention, bars of abutment only at their upper ends. and notsuitable dimensions to bridge the space bewithstamlintr the support may be of arcutween supporting elements of a pulverizing ate form and extend to such portion of a cirn'iachine, or other apparatus where grate cle as approximates the vertical at one or bars are used, are provided on their lower both ends of the grate. I as well as their upper nuirginal portions According to the present invention, each with faces adapted to receive and supportbar 1 has its marginal portion 3, as well as the material that is to be acted upon, and the portion 3, designed to enter into and these marginal portions are each provided torin a part of the supporting surface of on opposite sides thereof with spacing lugs the grate; and in order that the bars may which, when in uppei position, will meet be properly spaced, with the marginal p0r-- the spacing lugs on the upper portions of tions 3 presented upwardly, the bars are adjacent grate bars and determine the spzieprovided with additional lugs 2 adjacent Nitnrr," specti nargtnalportions of the bars are the i'iui-ni n'iun-i-spacing between" said upper" position and another tion are to provide a term. of grate bar-which, positions which they assume in use, and with i the mar inal portions 3. The abutting faces of t e lugs 2, as well as of the lugs 2*, will preferably be constructed on radii of the .arc of the supporting ledge 4 and confining ledge 5. According to Figure 1, the

. ured by the sum of a short and along lug and, therefore, of intermediate width. In Figure 3, the bars are all positioned with their ends 3 and longer lugs 2 u permost, with the result that the spaci-ngoi the bars is defined by the sum of two long lugs, and is, therefore, the maximum that can be obtained.

From the foregoing description, it will be seen that each grate bar is given a double life by reason of having two different faces adapted to be brought into .the surface oi the grate, and, by selectively positioning the bars, three different spacings may be obtained.

I claim: 1. A grate bar, constructed with two loadbearing marginal portions extending Ion 'sociated with each marginal portion so that gitudinally of the bar, and spacing lugs associated with each marginal portion so that the bars may be supported in either of two positions; the lugs at opposite marginal por- 3 tions being of different length.

2. A grate bar, constructed with two loadbearing marginal portions extending longitudinally of the bar,-and spacing lugs asthe bars may be supported in either of two positions; the lugs at opposite marginal portions being of different length; and a lug on each marginal portion of a bar, when the marginal portion is presented at the Stir-- face of the grate, being adapted to abut against either of the lugs on an adjacent bar presented in said position.

3. Grate bars adapted to be assembled to form a grating, each of which has longi- 5 tudinal marginal portions constructed for presentation at the surface of the grating, and each of which has spacing lugs adjacent its respective marginal portions, said lugs being of different length; a long lug 5 on one bar, when in said position, being adapted to enter into abutment with either the long lug or the short lug of an adjacent bar similarly positioned.

Signed at Chicago, Illinois, this 12th day of February, 1925.

HERVEY S. KNIGHT. 

